﻿#region License, Terms and Conditions
//
// Copyright (c) 2008, aspZone.com
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the <organization> nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY aspZone.com ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Author(s):
//  John Rudolf Lewis (http://aspZone.com)
//
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using NHibernate;
using NHibernate.Linq;

namespace aspZone.Commerce.DataAccess
{
    public abstract class Repository<T>
    {
        public ISession Session { get; private set; }

        public Repository()
        {
            this.Session = DataAccessConfiguration.GetSession();
        }

        public IQueryable<T> Queryable
        {
            get
            {
                return this.Session.Linq<T>();
            }
        }

        public T Get(object id)
        {
            return this.Session.Get<T>(id);
        }

        public T Load(object id)
        {
            return this.Session.Load<T>(id);
        }

        public IList<T> Find()
        {
            return this.Session.CreateCriteria(typeof(T)).List<T>();
        }

        public void Save(T entity)
        {
            this.Session.Save(entity);
        }

        public void Update(T entity)
        {
            this.Session.Update(entity);
        }

        public void SaveOrUpdate(T entity)
        {
            this.Session.SaveOrUpdate(entity);
        }

        public void Delete(T entity)
        {
            this.Session.Delete(entity);
        }

        public void CommitChanges()
        {
            this.Session.Flush();
        }

        public void BeginTransaction(System.Data.IsolationLevel isolationLevel)
        {
            if (this.Session.Transaction == null || !this.Session.Transaction.IsActive)
            {
                this.Session.BeginTransaction(isolationLevel);
            }
        }

        public void CommitTransaction()
        {
            if (this.Session.Transaction != null)
            {
                this.Session.Transaction.Commit();
            }
        }

        public void RollbackTransaction()
        {
            if (this.Session.Transaction != null)
            {
                this.Session.Transaction.Rollback();
            }
        }

        public void Clear()
        {
            this.Session.Clear();
        }
    }
}
